It is of course not precluded that a Mira pairs with a compact companion to
form a symbiotic star. For example V407 Cyg, prior to its 2010 nova
outburst, was primarily studied as a Mira suffering from possible
dust-obscuration episodes [1]}, [2]}
with little (or none) spectroscopic evidences for binarity
[3]}. Mira itself (= \(o\)  Cet) is a well known
acc-SySt: Hubble in the ultraviolet and Chandra at X-rays
have spatially resolved its WD companion, the accretion disk and the stream
fueling it [4]}. Such a plethora of multi-wavelength
information is however not available for a typical GALAH anonymous star, and
to be on the safe side we decided - at the initial stage of our project
represented by this paper - to filter out the radial pulsators. Such a
pruning is based on converging photometric (lightcurve) and spectroscopic
(H\(\beta \) /H\(\alpha \)  emission ratio) criteria, described below.
<FIGURE>